English:Producing forged parts by machine forging — Tools and materials

Producing forged parts by machine forging — Tools and materials

MOOCwiki module metadata
Parent learning area	Producing forged parts by machine forging
Module	Tools and materials
Target learners	Vocational learners in blacksmithing, artistic metalwork and related forge practice
Target language	English
Selected jurisdiction	United Kingdom; legal duties in this module are limited to Great Britain, with the England-only apprenticeship pathway labelled separately
Learning level	Vocational foundation to Level 3 progression
Learning mode	Blended theory, supervised workshop observation and supervised practical work
Open licence	Prepared for open publication under Creative Commons Attribution-ShareAlike 4.0; embedded third-party media retain their own stated licences
Review status	Draft for competent blacksmith, forge supervisor, health-and-safety and vocational-education expert review
Current-information check	Official-source claims checked 1 September 2026

Safety and jurisdiction notice: Machine forging can expose you to crushing, trapping, ejected hot scale or workpieces, extreme heat, fire, noise, vibration, dust and fumes. You must not operate a power hammer, forging press, furnace, grinder or other hazardous equipment without competent instruction, authorisation and direct supervision appropriate to your stage of training. The employer's risk assessment, safe system of work, machine manufacturer's instructions, local emergency arrangements and current official rules take precedence over this learning module.

United Kingdom scope: The workplace-law references below are for Great Britain: England, Scotland and Wales, using Health and Safety Executive guidance. Northern Ireland has a separate regulator and is not covered here. The vocational pathway section is explicitly England only. No automatic equivalence with qualifications, standards, licences, job titles or legal duties in any other country is claimed.

Introduction

Machine forging uses powered equipment to deform hot or, in some processes, cold metal between dies or tooling. In blacksmithing and artistic metalwork, the most familiar machines are the power hammer and the hydraulic forging press. Both can move metal much faster than hand hammering, but they do so differently: a hammer delivers repeated impact blows, while a hydraulic forging press applies a slower compressive force. Good work depends on selecting the right stock, heat, dies, tongs, handling method and sequence of deformation.

This module concentrates on the tools and materials that make machine forging controllable, repeatable and safe. You will learn how practitioners identify stock, choose suitable gripping and forming tools, recognise machine-tooling functions, plan material flow, inspect a setup, judge forging quality and reduce waste. Practical activities are written for supervised vocational teaching rather than unsupervised home use.

Visual reading: This Wikimedia Commons image shows a hydraulic forging press. When analysing any press photograph, identify the ram, upper and lower tooling, workpiece zone, operator position and likely exclusion zone. A photograph cannot confirm whether guarding, controls or operating procedures are adequate; those must be checked against the actual machine and workplace system.

Load video

YouTube

YouTube might collect personal data. Privacy Policy

Continue Dismiss

The video above shows a practitioner using both a forging press and a power hammer while producing a hammer. Treat it as process observation rather than a substitute for local training: note how the workpiece is supported, how tooling changes the direction of metal flow and how the operator reorients the work between stages.

Learning Outcomes

By the end of this module, you should be able to explain the difference between impact forging and press forging, identify common machine-forging tools and stock forms, select appropriate tongs and dies for a planned operation, recognise unsafe or unsuitable material, describe key Great Britain risk controls, plan a supervised machine-forging sequence, inspect a cool finished part against specified quality criteria, and propose material- and energy-efficiency improvements.

Jurisdiction, Safety Duties and Vocational Context

Great Britain: workplace law and official guidance

The Health and Safety at Work etc. Act 1974 provides the broad framework for workplace health and safety in Great Britain. For machine forging, several more specific duties are commonly relevant.

The PUWER 1998 require work equipment to be suitable for its intended use, maintained in a safe condition, inspected where necessary, used by people who have received adequate information, instruction and training, and provided with appropriate measures such as guarding, controls, isolation and warning devices. HSE also publishes an Approved Code of Practice and guidance on the safe use of power presses; whether its press-specific provisions apply to a particular forging machine must be determined by the dutyholder from the machine type and use.

The Control of Noise at Work Regulations 2005 require employers to assess noise risk, reduce exposure, ensure exposure limits are not exceeded, provide hearing protection where residual risk requires it, provide information and training, and arrange health surveillance where appropriate. Forging hammers can be intense noise sources, so hearing protection is not a substitute for quieter equipment, isolation, acoustic treatment, maintenance and exposure management.

The Control of Vibration at Work Regulations 2005 require employers to assess and control vibration risks. HSE specifically lists hand-fed forging hammers among work activities that can create hand-arm vibration exposure and recommends choosing suitable equipment, reducing exposure and maintaining machinery correctly.

The Personal Protective Equipment at Work Regulations 1992, as amended in 2022, require suitable PPE where risks remain after other controls, along with information, instruction, training, maintenance and replacement arrangements. PPE selection must be task-specific. Gloves, for example, may protect against some thermal or abrasion hazards but can introduce snagging or entanglement concerns around moving machinery; the workplace risk assessment and machine instructions decide what is suitable.

The Manual Handling Operations Regulations 1992 establish a hierarchy of avoiding hazardous manual handling where reasonably practicable, assessing unavoidable hazardous handling and reducing the risk of injury. Long bar, heavy billets, dies and tooling should therefore be moved with planned methods and mechanical assistance where required.

Processes around forging may also create exposure to hazardous substances. HSE identifies engineering hazards including dust from mechanical cutting and shaping, welding or cutting fumes, metalworking fluids, lubricants and chemical surface-treatment products; the COSHH framework requires appropriate assessment and control. Never place unknown, painted, plated, galvanised, oily or chemically contaminated stock in a forge simply because it looks like usable steel.

Great Britain: competence and supervision

HSE states that people who use work equipment need appropriate training and that those providing training should themselves be sufficiently skilled and competent for the equipment and risk involved. In a vocational forge, competence is built progressively: observation, cold setup practice, supervised hot work, coached repetition and assessment against workplace criteria. A learner who is not yet authorised to run a machine can still demonstrate substantial knowledge by identifying tooling, checking materials, planning a pass sequence, measuring cool parts, analysing video and completing risk-control tasks.

Official rules and workplace instructions take precedence. This aiMOOC does not grant machine-operating authorisation, a qualification, a licence or certification.

England only: vocational pathway

Skills England lists the Blacksmith apprenticeship standard ST0378, version 1.1 as approved for delivery, Level 3, with a typical duration of 48 months. Its occupational profile covers hot forging and other metalworking for bespoke, small-batch, artistic, architectural, heritage and industrial work. The occupational standard includes hot forging by hand and machine, preparation and maintenance of tools and materials, and fixed forge equipment such as power hammers, presses, forges and furnaces.

This is an England-only training-pathway example. It must not be treated as automatically equivalent to apprenticeship systems or qualifications elsewhere in the United Kingdom or abroad.

British Standards: use the correct scope

A British Standard can support specification, machine design, inspection or product acceptance, but standards are not automatically law and not every standard applies to every forge machine. Always check the current edition, status and scope with BSI and the actual machine supplier.

For example, BSI lists BS EN 14673:2006+A1:2010 for hydraulically powered open-die hot-forging presses for steel and non-ferrous metals. BSI also lists BS EN 10243-1:1999 for dimensional tolerances on steel drop and vertical press forgings. These references illustrate how a machine type or product specification can have a tightly defined scope; they are not blanket instructions for a school forge.

Core Concepts

Machine forging and material flow

Forging changes a workpiece by plastic deformation. When steel is hot enough for the intended process, its resistance to deformation falls and it can be shaped with less force than at room temperature. The exact working range depends on the steel grade, section size, required operation and process specification. Colour is useful to an experienced smith but is not a calibrated thermometer, and ambient light strongly changes colour perception. For grade-sensitive work, use the approved temperature-measurement method and supplier or process data.

The main deformation actions you will meet are:

Operation	What happens to the metal	Typical machine tooling
Drawing down	Length increases while cross-section decreases	Flat dies, drawing dies or peened dies
Upsetting	Cross-section increases while length decreases locally or overall	Flat dies or purpose-made upsetting tooling
Fullering	Material is displaced away from a narrow contact line to establish a shoulder or rapid change of section	Fuller or radiused tooling
Swaging	A section is brought toward a defined shape, often round, hexagonal or decorative	Matched swages or shaped dies
Bending	A heated section is curved around a controlled geometry	Bending dies, forks, blocks or jigs approved for the machine
Punching and drifting	A hole is opened and then sized or shaped	Punches, bolsters and drifts designed for the material and machine
Die forging	Metal flows into a shaped die impression	Matched impression dies with controlled billet volume

Machine forging is not simply “hit it harder.” Good operators control where the force is applied, how much reduction occurs per pass, where the workpiece is supported, how the stock is rotated and when to reheat. Uncontrolled reduction can create laps, folds, cold shuts, excessive scale loss, distorted sections or cracks.

Impact versus pressure

A power hammer stores and delivers energy through a moving ram or hammer head. Depending on design, the operator may control single blows, blow intensity or a repeating stroke rate. The workpiece can move rapidly, so secure gripping, stable stance, controlled presentation and an exclusion zone are essential.

A hydraulic forging press develops force more slowly through a ram. The longer contact time can move material differently from an impact hammer and can make some operations, such as controlled drawing or punching, easier to stop and inspect between strokes. It still presents severe crushing and trapping hazards. A slow ram is not a low-risk ram.

Load video

YouTube

YouTube might collect personal data. Privacy Policy

Continue Dismiss

In this practitioner video, observe how a purpose-made power-hammer die changes the rate and direction of drawing. The main learning point is tooling geometry: a narrow peen concentrates deformation, while a broad flat face spreads force over a larger area.

Process map: from stock to inspected forging

Material identity →	Cut or prepare →	Heat →	Grip and present →	Forge in planned passes →	Reheat as required →	Cool by specified route →	Inspect and record
Confirm grade, section and traceability	Remove prohibited coatings and prepare safe ends	Use approved forge/furnace procedure	Use correctly fitted tongs or manipulator	Control reduction, rotation and tool contact	Stop before temperature falls below the approved working range	Follow material/process instruction	Check dimensions, surface, straightness and defects

The process is a loop rather than a straight line: inspection during the job may send you back to reheating, tool adjustment by an authorised person, or a revised pass sequence. If the workpiece, tool or machine behaves unexpectedly, stop and ask the supervisor rather than improvising.

Tools for Machine Forging

Power hammers

Common forge-shop power-hammer types include mechanical spring hammers, pneumatic or self-contained air hammers, and industrial drop or counterblow systems. Vocational learners usually meet smaller mechanical or pneumatic hammers. Terminology varies by maker, but the key parts are the frame, ram, upper die, lower die or anvil block, controls, power system and foundations.

This preserved drop-forging hammer in Sheffield is useful for scale and heritage context. A modern training forge may use very different controls and guarding, so a historic machine image must never be treated as a current safety model.

Pre-use learning checks, carried out only within your authorised role, include confirming that the machine has been released for use, guards and barriers are present, the work zone is clear, controls and emergency arrangements are understood, dies are correctly secured, there is no obvious leak or damage, and the planned stock and tongs fit the task. Any abnormal noise, loose tooling, damaged guard, control fault, leak or unexpected movement is a stop condition.

Forging presses

Hydraulic forging presses use a hydraulic power system to move the ram. Tooling may be flat, radiused, fullering, swaging, punching or purpose-made. Presses may seem easier to “place” than hammers because the ram moves more slowly, but crush severity is extremely high. Hands, fingers and improvised packing must never enter a danger zone unless the machine is isolated and the authorised safe system specifically permits a setup task.

Annotated machine-zone reading

Zone	What you identify	Why it matters
Ram and upper tool	Moving mass and tool face	Primary crushing zone
Lower tool or die	Fixed reaction surface	Must match and support the planned operation
Workpiece path	Where hot stock enters and leaves	Controls line of fire and ejection risk
Operator position	Where controls and handling are coordinated	Must support stable posture and clear escape
Bystander boundary	Area outside the operator's working envelope	Prevents others entering the line of fire

Dies and top-and-bottom tooling

Flat dies are general-purpose faces for drawing, upsetting, flattening and correcting. Drawing dies or peened faces concentrate deformation to lengthen stock quickly. Fullers localise deformation and establish shoulders. Swages control a finished profile. Impression dies contain cavities that shape a billet toward a repeatable form.

Tooling must be compatible with the specific machine, holder, stroke, capacity, material and task. Never improvise die mounting, stack loose spacers, weld onto a machine tool, or modify a die without an engineered and authorised procedure. Tool faces should be checked for damage, mushrooming, cracking, insecure keys or fasteners, contamination and any defect specified in the maintenance system.

Tongs and work-holding tools

Forge tongs are not generic pliers. Their jaws, reins and boss are shaped to hold a particular stock size and profile. Common workshop terms include flat-jaw tongs, V-bit tongs, box-jaw tongs and bolt tongs. For machine forging, the grip must resist impact or press reaction without forcing the operator to over-grip.

A good tong fit gives broad contact, does not rock excessively, keeps the reins in a controllable position and allows the workpiece to be presented without placing hands near the dies. Tongs with cracked reins, loose rivets, distorted jaws, sharp burrs or poor alignment should be removed from use and repaired by a competent person.

Hand tools used around machine forging

Typical supporting tools include hand hammers, set hammers, fullers, punches, drifts, hot chisels, hardy tools, swages, callipers, rules, templates, gauges, wire brushes and scale-removal tools. Their use near a running machine is governed by the local safe system. A hand tool that is safe on an anvil may become a projectile or trapping hazard if presented incorrectly under a power hammer or press.

Struck tools require routine inspection. Mushroomed heads, cracked shafts, loose handles and damaged working ends are common reasons to remove a tool from service. HSE also publishes specific guidance for abrasive wheels used in grinding and dressing operations.

Measuring, templates and jigs

Repeatable machine forging depends on measurement. Use drawings, samples, templates, stop gauges, callipers and rules as specified. Measurements that require entry into a machine danger zone are made only when the machine is in the safe state required by the local procedure. Hot dimensions also change during cooling, so the drawing or process sheet should state whether a dimension is checked hot, warm or cold and what tolerance applies.

A jig should control geometry without introducing a new pinch, ejection or entanglement hazard. Jigs and fixtures need a defined storage location, identification and inspection status so that obsolete or damaged tooling is not accidentally reused.

Materials

Stock forms and terminology

Blacksmiths commonly buy steel as round bar, square bar, flat bar, angle, plate, strip or larger billet. A billet is a prepared piece of stock intended for further forging. A blank is a cut piece prepared for a particular operation. A preform has already been shaped so that the next forging stage can fill a die or form a feature more efficiently.

For learning exercises, low-carbon steel is often selected because it is forgiving to forge and readily available. In UK workshop speech it is commonly called mild steel. For assessed or commissioned work, however, use a specified and traceable grade where the design, client or process requires it. Do not assume that every piece sold informally as mild steel has identical composition or properties.

Material identification comes before heating

Before heating a piece of metal, establish what it is. Marking, supplier documentation, stock records, colour coding and batch labels may all form part of the identification system. Where traceability matters, preserve the material identity through cutting and part production.

Unknown scrap is not an acceptable substitute for identified stock in a vocational machine-forging exercise unless a competent person has positively identified and approved it. Unknown material may be hardenable alloy steel, cast iron, leaded material, plated steel, high-strength steel or a non-ferrous alloy with a very different hot-working range.

Low-carbon and structural steels

Low-carbon steel is widely used for decorative scrolls, brackets, architectural components, sample tapers and general practice. It can usually tolerate substantial hot deformation when worked within the approved temperature range. In professional work, the stock specification should match the design function: a decorative sample, a load-bearing component and a tool blank do not have the same material requirement.

Structural grade designations such as S275 may appear in UK supply chains, but a structural product specification does not by itself define a complete forging procedure. Where mechanical properties are important, the designer or responsible engineer specifies material, forging route, heat treatment, inspection and acceptance criteria.

Medium-carbon, alloy and tool steels

Punches, drifts, fullers, dies and hammers may be made from medium-carbon or alloy tool steels. Examples used in industry include chromium-molybdenum and hot-work tool steels, but the correct choice depends on impact loading, working temperature, section, heat treatment and machine. These materials can crack or become dangerously brittle if forged or heat-treated incorrectly. Learners should follow a verified material data sheet and instructor-led procedure rather than guessing from colour or spark appearance.

Stainless and non-ferrous alloys

Stainless steels, copper alloys, aluminium alloys and other non-ferrous materials can be forged, but each has its own temperature range, oxidation behaviour, contamination concerns and tooling requirements. Some alloys have a comparatively narrow safe hot-working range. This module does not treat them as direct substitutes for low-carbon steel. If your workshop introduces one of these materials, use a separate material-specific procedure.

Coatings, contamination and hollow stock

Do not heat galvanised, painted, plated, oily or chemically contaminated stock unless the competent workplace procedure has specifically assessed and controlled the process. Heating coatings can generate hazardous fumes or decomposition products. Cleaning methods themselves may create dust, fume, solvent or abrasive-wheel hazards.

Do not forge sealed, capped or contaminated hollow sections. Trapped liquid, gas or scale can create pressure when heated. Any hollow-stock operation requires a verified method that prevents a pressure trap and is approved for the equipment.

Scale and surface condition

Iron oxide scale forms on hot steel exposed to oxygen. Heavy scale can imprint into a surface, reduce detail and contribute to material loss. Depending on the job and the equipment, scale may be brushed, blown or otherwise removed using an approved method. Never use a descaling technique that sends loose scale toward another person or requires a hand to enter a danger zone.

The image above shows a forged component with a pronounced worked surface. Use such images to practise defect description: distinguish normal forging texture and scale from laps, cold shuts, cracks, underfill, excessive mismatch or unintended die marks.

Selecting the Tool-Material Combination

A practical selection begins with the finished geometry and works backward. Ask:

1. Material specification: What grade, section, condition and traceability are required?
2. Forging operation: Will you draw, upset, fuller, bend, punch, swage or fill an impression?
3. Machine capability: Is the authorised hammer or press suitable for the stock size and tooling?
4. Work holding: Which tongs, manipulator or fixture gives secure control without over-gripping?
5. Die geometry: Which tool face moves metal in the required direction with the fewest unnecessary heats?
6. Inspection plan: What dimensions, surface criteria and records will prove that the forging is acceptable?

A common beginner mistake is choosing the machine first because it is available. In professional planning, the component and process requirements determine the equipment, not the other way round.

Risk Controls for Tools and Materials

Hierarchy of control

Risk control starts above PPE. A practical hierarchy is: eliminate the hazard where possible, substitute a safer material or process, use engineering controls, use administrative controls and safe systems of work, then use suitable PPE for residual risk.

Hazard	Examples in machine forging	Preferred control direction
Crushing and trapping	Dies, ram, moving linkages, workpiece between tooling	Guarding, safe control systems, exclusion, isolation, engineered handling
Ejection and scale	Poor grip, misaligned stock, loose scale, broken tooling	Correct tongs, stable presentation, sound dies, barriers, controlled blow or press sequence
Heat and fire	Hot stock, radiant heat, forge flame, hot scale	Segregated hot-metal route, non-combustible area, fire controls, labelled hot zones
Noise	Repeated hammer impact, extraction, grinding	Quieter equipment, maintenance, enclosure or separation, exposure management, hearing protection for residual risk
Vibration	Hand-fed forging hammers, grinders	Process selection, maintenance, exposure reduction, suitable tooling and health surveillance where required
Dust and fume	Grinding, scale, coatings, welding and cutting	Avoid hazardous coatings, extraction or LEV, process control, suitable RPE where required
Manual handling	Long bar, heavy billets, dies, tooling	Handling aids, team method, storage at workable height, planned routes
Slips and trips	Scale, hoses, bar ends, tools on floor	Housekeeping, defined racks, clear walkways and cable or hose management

PPE as the last line of defence

Workshop PPE may include impact-rated eye protection, face protection where the risk assessment requires it, hearing protection, safety footwear and suitable work clothing. The exact combination must be specified locally. Clothing should not be loose around machinery, and hot-metal risk may require flame-resistant or otherwise suitable garments. PPE never makes it acceptable to reach into a crush zone, stand in the line of fire, use damaged tongs or defeat a guard.

Stop-work triggers

Stop and make the machine safe in accordance with the local procedure if a die loosens, a workpiece starts to slip uncontrollably, a tong joint fails, a guard or control is defective, a hydraulic or pneumatic leak appears, the machine makes an abnormal sound, the workpiece develops a serious crack, an unexpected person enters the exclusion zone, visibility is lost, or you are unsure about the material or next step.

A learner is expected to stop when uncertain. Safe refusal to continue an uncontrolled process is evidence of professional judgement, not failure.

Step-by-Step Demonstration

Supervised demonstration: drawing a square low-carbon-steel bar to a short taper under flat power-hammer dies

Training condition: This demonstration is for a vocational workshop with a competent instructor in direct control of authorisation, machine setup, heating procedure and emergency arrangements. It is not an instruction for unsupervised practice.

Training objective: Produce a short, straight taper from identified low-carbon square bar while maintaining a square cross-section and recording the tool and material choices.

Before the learner approaches the hot process, the instructor confirms the machine is suitable, the flat dies are correctly installed and released for use, the controls and stop procedure are understood, the exclusion zone is established, and the learner has the specified PPE. The learner identifies the stock, checks the cold dimensions, selects correctly fitted tongs and rehearses the presentation with cold stock if the local system allows it.

1. Read the process sheet: Confirm the drawing, target taper length, final section, material identity, approved heat range and inspection points.
2. Check the work-holding choice: Fit the tongs to cold stock and verify that the jaws seat securely without excessive hand force.
3. Heat under supervision: Heat only in the approved forge or furnace, using the workplace method to judge or measure the working temperature.
4. Establish body position and exclusion: Approach only when the instructor authorises it; keep a balanced stance, a clear retreat path and no bystander in the line of fire.
5. Present the first zone: Place the heated end flat on the lower die, with the bar square to the die face and the tong grip outside the working contact zone.
6. Use light establishing blows: Under instructor control, begin with light blows to confirm grip, alignment and intended metal flow before increasing the work rate allowed by the process.
7. Rotate consistently: Rotate the square bar by quarter turns between controlled passes so that reduction remains balanced and the section stays approximately square.
8. Work progressively: Move the contact zone along the taper rather than crushing one spot excessively; keep the transition smooth and avoid a sharp unintended shoulder.
9. Stop before the heat is unsuitable: If the process sheet, instructor or material response indicates that the stock is too cool for the next reduction, stop and reheat rather than forcing the operation.
10. Correct while there is enough heat: Make only the corrections authorised by the instructor; if the workpiece twists, slips, cracks or develops an uncontrolled fold, stop.
11. Cool by the specified route: Place the workpiece in the designated hot-metal area and use the cooling or heat-treatment instruction for that material; do not quench merely to make the part safe to touch.
12. Inspect when safe: Once cool enough for the specified inspection, measure taper length, end section, straightness and symmetry; record scale condition, marks, laps, cracks or other defects.
13. Review the process: Compare the number of heats, pass sequence and material loss with the plan, then identify one improvement that does not compromise safety.

Demonstration success criteria: The learner follows the safe system without prompting for critical controls, maintains secure work holding, uses a consistent rotation sequence, produces a smooth taper close to the specified geometry, stops appropriately when conditions change, and completes an honest inspection record.

Load video

YouTube

YouTube might collect personal data. Privacy Policy

Continue Dismiss

This manufacturer demonstration shows a purpose-built hot-wrought-iron machine forming decorative ends. Compare it with open-die hammer work: specialised machinery constrains motion and can improve repeatability, but it introduces its own guarding, control and work-holding requirements. Never transfer operating steps from a video to a different machine.

Common Errors and Corrective Thinking

Error	Likely consequence	Better practice
Using tongs that almost fit	Workpiece rocks, slips or is over-gripped	Select or adjust approved tongs to the actual stock section
Forging stock of unknown grade	Unpredictable working range, cracking or hazardous coating exposure	Identify and approve stock before heating
Taking too much reduction in one place	Deep die marks, folding, distortion or loss of section control	Use progressive passes and inspect metal flow
Continuing as the work becomes too cool	Cracking, excessive force and poor surface	Reheat according to the process specification
Rotating inconsistently	Diamonded, twisted or uneven square section	Use a planned quarter-turn rhythm and visual checks
Measuring in the danger zone	Crush or trapping exposure	Use the safe machine state and measuring method required by the procedure
Treating PPE as the main control	Critical machine hazards remain uncontrolled	Apply guarding, exclusion, safe systems and engineering controls first
Quenching a sample just to handle it sooner	Unintended hardening or cracking in some steels	Use the specified cooling route and hot-part controls
Ignoring scale between passes	Surface imprints, detail loss and extra material loss	Use the approved scale-management method
Copying a video sequence without checking the local machine	Wrong controls, tooling or capacity assumptions	Use the manufacturer instructions and workplace procedure for the actual machine

Quality Criteria

A forging is not high quality simply because it looks attractive. Quality combines conformance, material integrity, repeatability, efficient processing and documented safe manufacture.

Quality area	Questions to ask
Material identity	Is the specified grade or approved stock recorded and traceable where required?
Dimensions	Does the cool part meet the drawing, template or agreed tolerance?
Shape	Are tapers, shoulders, radii, bends and transitions smooth and located correctly?
Straightness and symmetry	Is unwanted twist, bow or section distortion within the acceptance criteria?
Surface	Are there cracks, laps, cold shuts, folds, deep scale pits or unintended die marks?
Die fill	For impression work, is the cavity filled without unacceptable underfill, mismatch or excessive flash?
Heat history	Was the material worked and cooled according to the process or material specification?
Repeatability	Can the next component be made to the same standard using the recorded setup?
Records	Are measurements, material identity, tool setup and non-conformities documented as required?
Safe manufacture	Were stop conditions, controls and supervision requirements followed throughout?

For contract or safety-critical work, tolerances and acceptance criteria come from the drawing, specification, standard and responsible engineer or customer. Do not invent a generic tolerance because a number seems achievable.

Sustainability and Resource Efficiency

Machine forging can be material-efficient because deformation keeps much of the original stock in the part, but poor planning can waste steel, fuel, tooling and machine time. Sustainable practice starts with good process design.

1. Cut planning: Nest cut lengths and retain only clearly identified offcuts that are large enough and suitable for future work.
2. Heat management: Heat the required section and batch compatible work where the safe process allows it, instead of repeatedly heating unnecessary stock.
3. Process efficiency: Use die geometry and pass sequences that reach the target with fewer corrective heats and less grinding.
4. Scale reduction: Avoid excessive soaking or overheating that increases oxidation and material loss.
5. Tool maintenance: Keep dies, tongs, burners, extraction and powered equipment in good condition so that energy and material are not wasted compensating for faults.
6. Scrap segregation: Separate ferrous and non-ferrous scrap by the workplace recycling system and preserve grade identity when reuse is intended.
7. Responsible finishes: Specify coatings and cleaning processes for service need rather than habit, and account for their hazardous-substance and end-of-life impacts.
8. Measurement and learning: Compare input stock mass, finished part mass, number of heats and rejected parts to identify the biggest source of avoidable waste.

Sustainability never justifies unsafe reuse of unknown scrap, bypassing extraction, reducing required inspection or extending tool life beyond safe limits.

Inclusive Learning and Reasonable Adjustment

A safe forge course should not assume that every learner has the same reach, grip strength, hearing, vision, mobility, language background or prior workshop experience. Instructors can use enlarged drawings, tactile cool samples, captioned video, written and spoken instructions, visual process cards, paired observation, alternative measuring tasks and adjustable-height planning benches.

Reasonable adjustments must preserve the safety-critical learning outcome. If a learner cannot safely operate a specific machine, evidence can first be gathered through planning, observation, tool identification, hazard analysis, cool-part inspection and simulation while the training provider decides what safe practical access is possible. No learner should be pressured to perform a hazardous task outside their competence or adjustment plan.

Glossary

Term	Practitioner meaning in this module
Billet	A prepared piece of stock intended for forging
Blank	Stock cut to the size or mass needed for a specific operation
Die	Tool surface that contacts and shapes the workpiece
Drawing down	Reducing cross-section to increase length
Upsetting	Increasing cross-section by shortening material
Fuller	Tool with a narrow or radiused contact that spreads metal away from the contact line
Swage	Tool that brings a section toward a defined profile
Power hammer	Powered forging machine that delivers repeated impact blows
Forging press	Machine that applies compressive force through a moving ram
Ram	Moving machine member carrying the upper tool or die
Tongs	Forged work-holding tool selected to suit stock shape and size
Reins	Long handles of forge tongs
Boss	Pivot area of forge tongs around the rivet
Preform	Partly shaped stock prepared for a later forging stage
Scale	Oxide formed on hot metal exposed to oxygen
Lap	Surface fold that is forged over without soundly joining
Cold shut	Defect where two metal-flow fronts meet without properly bonding
Die mismatch	Offset between upper and lower die impressions or forged halves
Flash	Excess metal squeezed into the parting-line gutter of some impression-die forgings
Traceability	Ability to connect material and part records back to a known batch, specification or source
Line of fire	Position where a person could be struck by a moving, ejected or failed workpiece, tool or fragment
Isolation	Securing machinery against hazardous energy according to the authorised procedure

Reflection

Think about a forged bracket, tool or decorative component that could be made either by hand hammering or by machine forging. Which parts of the job would benefit from a power hammer or press, and which would be easier to control by hand? What would change in the tong design, stock length, number of heats, inspection method and exclusion zone? Finally, identify one point at which stopping the process would demonstrate greater skill than continuing.

Interactive Tasks

Quiz: Test Your Knowledge

What is the first requirement before heating stock for a vocational machine-forging exercise? (Confirm the material identity and approval) (!Choose the largest available hammer) (!Quench the stock to remove scale) (!Grind the stock until it is shiny)

What best describes drawing down? (Reducing cross-section to increase length) (!Increasing cross-section by shortening) (!Cooling steel rapidly in water) (!Joining two parts with a fastener)

Why must forge tongs match the stock section? (To maintain secure controllable work holding) (!To make the stock heat more quickly) (!To eliminate the need for guarding) (!To replace machine maintenance)

What should you do if a die becomes loose during a supervised forging task? (Stop and follow the safe shutdown procedure) (!Continue with lighter blows) (!Hold the die with another tool) (!Increase the workpiece temperature)

Which control is preferred before relying on hearing protection? (Reduce noise through engineering or process controls) (!Increase hammer speed) (!Use thicker gloves) (!Shorten the tongs)

Why is unknown galvanised or painted scrap unsuitable for routine forge practice? (Heating may create hazardous fumes and the material is uncertain) (!It always becomes stainless steel) (!It cannot form oxide scale) (!It is always too soft to forge)

What is a key quality sign in a forged taper? (A smooth controlled transition with the specified geometry) (!Maximum visible scale) (!Deep repeated die marks) (!An unrecorded material grade)

What does a hydraulic forging press primarily apply? (Controlled compressive force through a moving ram) (!Continuous abrasive cutting) (!Arc welding current) (!Rotary drilling torque)

What is the safest response when you are uncertain about the next machine-forging step? (Stop and ask the competent supervisor) (!Copy the nearest video) (!Increase force to test the material) (!Move closer to watch the dies)

Which record most directly supports material traceability? (A link between the part and its identified stock batch) (!A photograph of the forge fire) (!The operator's shoe size) (!The colour of the workshop wall)

Memory Game

Drawing	Reducing cross-section to increase length
Upsetting	Increasing cross-section by shortening material
Fuller	Tool that concentrates deformation along a narrow line
Swage	Tool used to control a finished profile
Billet	Prepared stock intended for forging
Scale	Oxide formed on hot metal
Traceability	Record link back to a known material source
Exclusion zone	Area kept clear of people during hazardous operation

Drag and Drop

Match the correct terms.	Topic
Secure work holding	Correctly fitted tongs
Controlled material flow	Appropriate die geometry
Material assurance	Verified stock identity
Dimensional repeatability	Template or gauge
Machine safety	Guarding and authorised controls

...

Crossword Puzzle

Billet	What is a prepared piece of stock intended for forging?
Fuller	Which tool concentrates deformation along a narrow or radiused contact?
Tongs	What work-holding tool is selected to match hot stock shape and size?
Upsetting	What operation increases cross-section by shortening the material?
Descaling	What process removes oxide from a hot-work surface using an approved method?
Traceability	What term describes linking a part back to its material source?

Cloze Text

Complete the text.

Machine forging changes metal by . A power hammer mainly delivers . A forging press applies . Before heating, the learner should confirm . Secure handling depends on correctly fitted . Oxide that forms on hot steel is called . If tooling loosens or movement becomes unexpected, the correct response is to . Final acceptance depends on the specified .

Open-Ended Tasks

Easy

1. Forge tool audit: With the machine stopped and access authorised, photograph or sketch five tools, label their practitioner names and explain one inspection point for each.
2. Material identity card: Create a one-page stock card for an identified low-carbon steel bar showing section, source information, intended use, storage location and traceability method.
3. Machine-forging storyboard: From one embedded video, produce a six-frame storyboard showing heat, grip, presentation, deformation, reorientation and inspection without copying unsafe details into a local procedure.
4. Hazard-zone map: On a provided workshop plan, mark the hot-metal route, operator zone, bystander boundary, emergency access and tool storage; review it with the instructor before entering the forge.

Standard

1. Cool-part quality inspection: Measure three cooled practice forgings against a drawing or template, record dimensional variation and classify visible surface defects using professional terminology.
2. Blacksmith interview: Interview a competent blacksmith or forge technician about how they choose tongs and dies for repeated machine-forging work; summarise what changes between one-off artistic work and small-batch production.
3. Material efficiency study: Compare stock length, offcut mass, scale loss and rejected parts for a supervised class exercise, then propose two realistic ways to reduce waste.
4. Tooling comparison poster: Produce an annotated poster comparing flat dies, drawing dies, fullers and swages, showing the direction of material flow each tool is intended to create.

Advanced

1. Supervised forging process plan: Write a complete process sheet for a simple machine-forged component, including material specification, tooling, tong choice, heat checkpoints, stop conditions, inspection stages and supervisor sign-off points.
2. Forging defect investigation: Analyse a set of rejected cool parts, identify likely causes of laps, twist, underfill, deep die marks or cracking, and propose corrective actions that respect the safe system of work.
3. Noise and vibration control proposal: Using employer-provided assessment data, manufacturer information and HSE guidance, propose engineering and organisational controls for a hammer station without carrying out unsupervised exposure testing.
4. Expert-review video: In a supervised workshop, create a short captioned training video that explains tool and material selection using cold samples or instructor-controlled footage, then have a competent blacksmith review the terminology and safety messages.

Learning Assessment

1. Process selection assessment: Given drawings for a taper, boss and decorative end, justify whether flat dies, a fuller, a swage or an impression die would best control material flow and identify the main risk-control implications.
2. Material decision assessment: Compare identified low-carbon steel, an unknown plated scrap bar and a specified tool-steel blank, and explain which is suitable for a supervised learner exercise and why.
3. Failure response assessment: Analyse a scenario in which a workpiece begins to slip and a die makes an abnormal sound; describe the correct stop, communication and isolation sequence using the local procedure as the authority.
4. Quality-transfer assessment: Inspect a cooled forging, relate each observed defect to a likely process cause and recommend a process change that improves both quality and safety.
5. Sustainability assessment: Redesign a simple production plan to reduce stock waste, unnecessary reheats and finishing time while preserving specification and safety controls.
6. Jurisdiction assessment: Explain which parts of this module are Great Britain legal guidance, which qualification example is England only, and why neither can be assumed equivalent in another country.

Evidence of Learning

Evidence type	What strong evidence looks like
Knowledge	Accurate explanation of power-hammer and press action, material flow, die functions, stock identity, defects, Great Britain risk duties and the limits of the England-only apprenticeship example
Skills	Correct tool and tong selection, safe cold setup reasoning, controlled supervised presentation, appropriate stopping, reliable cool-part measurement and clear record keeping
Products	Process sheet, stock card, annotated tooling poster, inspection record, sustainability study and supervised project artefact
Professional behaviour	Communicates clearly, keeps others out of the line of fire, does not improvise around safety controls, reports defects and asks for help when uncertain
Transfer	Can choose tools and materials for a new but comparable forging task and justify the choice using geometry, material behaviour, machine limits, quality criteria and risk controls

OERs on the Topic

The following media used in this course are available through Wikimedia Commons. Check each file page for the exact licence and attribution requirements:

1. Forging Press.jpg
2. Drop Forging Hammer in Brightside Sheffield MG 2185.JPG
3. Forging hammers.jpg
4. Tongs.jpg
5. Blacksmith tools.JPG
6. Drop forging Gesenkschmieden.jpg
7. Santa Fe RR steam drop hammer.jpg

This 1943 industrial photograph shows a steam drop hammer at a railway blacksmith shop. It is valuable as a historical comparison of scale, hot-stock handling and team coordination, but not as a modern safety example.

Further open and official learning sources

1. HSE: PUWER overview
2. HSE: Safe use of power presses
3. HSE: Noise at work duties
4. HSE: Vibration at work
5. HSE: COSHH and engineering workers
6. Skills England: Blacksmith apprenticeship standard ST0378
7. Skills England: Blacksmith occupational map

Expert-Review Checklist

Before formal teaching or assessment, a competent reviewer should confirm that the machine names match the actual workshop equipment, the manufacturer instructions are current, the local risk assessment and safe system of work are reflected accurately, the listed PPE matches the task-specific assessment, stock grades and temperature controls match supplier data, inspection tolerances come from the correct drawing or specification, emergency and isolation instructions match the site, and any qualification mapping still matches the current Skills England version.

The reviewer should also check accessibility, captions, visual contrast, reading level, terminology used by the local blacksmithing team, and whether any embedded external video has changed or become unavailable.

Sources and Current-Claim Record

The current-claim record above was checked against the competent authorities named in the references on 1 September 2026. If an official source, standard, machine manual, workplace instruction or qualification document changes, the newer authoritative requirement takes precedence over this course.

Linked Learning Areas

Producing forged parts by machine forging Machine forging Power hammer Forging press Forge tooling Forge tongs Hot working of steel Forging defects Forging quality control Workshop safety Sustainable metalworking